lisa monaco used to work for him as well. it's a telling picture because these are the federal pictures at the heart of the federal response briefing the president. you see the president looking toward the back of the room. toward the back of the room are the screens the secure video conference screens. and on the screen you're likely to have john brennan his former counterstorm advisocounterterrod perhaps other elements of the community that are videoed into the meeting. in essence, the president's getting a breafg. you see there he's probably asking some very good questions. and as john miller mentioned earlier, he doesn't want to just know about what's happening on the ground. you could probably watch cbs to get that but he wants to understand what links and information the federal government is gathering to understand more about these actors, whether or not they're connected to a broader network, what the federal government is doing to one tai contain this d. question for the whitehouse

coming up no doubt for owe firm- officials in nightfall and still don't have resutn. that's going to be a big question for officials in boston and it's going to be a question for the president. >> helen: juan zarate who has spent his share of time sitting in that same room with president bush as deputy national security advisor for counterterrorism. >> we mentioned the president's top terrorism advisor sleshgs monaco sitting there in the middle. as juan mentioned, this''s native of boston. you have to imagine that this attack on boston, the city where the president and lisa monaco have spent so much time seem very personal to them. yesterday the president was speaking at the cathedral of the holy cross at the memorial

service for the victims of the bombing and he recalled his time at harvard and interestingly from the put pit the president addressed the bombers before they were known and he said "we will find you." and it wasn't much more than 12 hours later that that is exactly what happened. also in washington is our senior washington correspondent and the anchor of "face the nation," bob schieffer. bob, i can't think of a time that we have seen this kind of manhunt that has locked down a major american city. >> i can't ever remember, scott, when we've had an entire city locked down. that's what's so extraordinary about this. listening to you and listening to john just now i think one of the reasons that they're having so much difficulty in finding this man is that we know so

little about him. is he a committed zealot? is the he a member of some cult? we don't know that. is he a criminal? he has mo criminal record. if we just knew more about him it might be easier toe out some sort of pattern that he's following but here's hat seths off these bombs apparently and is on a college campus yesterday talking to people as if it's just a fine spring day. it's these answers. the more we find out about him, the less we seem to know about him. a and i think that's what's going to be and has been so difficult in these hours as they roll by today. we still don't know exactly what it is that has caused him to do this. the. >> pelley: bob, it's been so long since 9/11, or at least it

feels that way in some ways but this is going to refocus the president's attention on terrorism. >> schieffer: well, terrorism has not gone away, noatter how some in washington will try to tell you that terrorism is no longer a threat. the bad guys are still out there. they may be different people now but they are simply people in many cases that just don't like america and do not wish us well. they're there, they come from many different places. i mean, these people coming from chechnya, these chechen rebels that pulled off that massacre in the town of beslan, remember back in 2005, scott, they killed more than 300 school children to try to advance their cause and people who try to advance a cause and are willing to kill innocent people in order to get attention, those are very dangerous people but, again, we don't know if these young men

were active militants, who were people who felt strongly about chechnya. their problem has always been with russia they wanted to be separated. they want a different government we didn't know that they had some sort of aa grievance against the united states, if indeed they do. we just don't know what is motivating this dwlung man and his brother. >> pelley: bob, thank you, as we look at this map we are seeing chechnya. our understanding is that these young men did not grow up in chechnya but are ethnic chechens. that they grew up next door just to the east in dagestan. chechnya has been involved, as was eling to, in a rui you civil war through the '90s and the 2000s there has been

terrorism involved in. that it was islamic separatists who wanted to have an independent state separate from russia. the russian army has put that revolt down. but the war spilled over into the country that these young men are from, dagestan and apparently the families, the exteplded families of this family emigrated to the united states as refugees in about 2002/2003. and these young men have been growing up, going to school here in the united states, became permanent legal residents. in other words green card holders, and the young man, the man who is now being sought in boston became a naturalized american citizen we are being told by the red sox organization that the red sox game has been at least postponed as the city

lockdown continues. terrell brown is our cbs news correspondent. he's on the ground there in watertown where we have been receiving these press briefings from time to time. >> reporter: we're waiting, scott. no definite time on when we'll hear that briefing and get more information but as you stand here you understand tha it a city where we arre in watertown. it is just an area and a community that is on edge. there are tense moments here basically because wow w you and what also bob was talking about not too long ago, so many residents here have never seen anything like this before. i landed here at boston logan not too long ago and just moving through the airport, just an incredible security presence. i mean, boston police state police, national guard, not just in the terminal but outside, all vehicles coming into the terminal, many vehicles stopped, they are searched. on the way over here, on the drive to this location where we are right now in watertown three

separate sections, not too far away from one another and my vehicle searched, bags in the car searched. i had to get out at one of those checkpoints. that was very serious security operation that shelter in place ordeil effect here in watertown as well as for boston. we've been talking about it for a good portion of the afternoon. mass transportation, the "t," as it's called, boston's mass transit system, the train system shut down. busses are not running, amtrak service is not running. the governor has asked residents to go home, to stay home and, of course, lock their doors and not open the door for anyone except for a uniform's officer and that will be the order we're told until further notice. >> reporter: in the moment a news conference begins at terrell's location we'll switch you live so we can get more information but speaking of information john miller has been talking to his extensive sources in law enforcement and, john, i understand you know more about what happened last night. >> a little bit.

this is in response to your question about what is it about these explosives that has gotten them to the pont where they want to blow it up without transporting it so i've been asking what it is about the explosives, how do we know? what do we know? and what emerges is some fascinating details about what occurred last night and some things that may occur later today. last night they chased them to a point where they stopped the car and engage in a shootout. >> pelley: and this is video we're seeing and more importantly hearing of this ferocious fire fight that occurred in the wee hours of the morning. >> then in the middle of this fire fight tamerlan, the older brother, throws a package, a big package our witnesses say, at police. we now know that that was another pressure cooker bomb exactly same device that was deployed against the boston marathon, the device that we have seen the horrific results of. he throws that at police and

apparently it functions, it detonates. why don't we have dozens of injured police officers from that explosion in the middle of that shootout? well, apparently what happened as he tossed it, the lid came off. now, the pressure cooker device is based on explosives building up so much pressure that it explodes the container which is supposed to be airtight but when the lid flipped off what you got was a big boom and a big bang and explosives go to the point of least resistance. so these explosives have somewhere to go, which was out into the air without blowing up the container. but i can recall hearing on the police radio last night them screaming over the radio "loud explosion, big explosion here at the scene." and that was probably that main charge. now, when they found tamerlan's body and they rushed him to the hospital where he was dead on arrival there is a ten-inch gash

that goes across his torso and a lot of scorching there. and what they seems to indicate or the question it raises-- and this also explains a lot of what we're hearing now about the fear that dzhokhar may be wearing an explosive vest or something is there was this dynamic scorching and a big hole there. so they'rendering did he have some explosive device on him that also functioned in all of that gunfire, the throwing of the pressure cooker bomb and these ano, ma'am lise in terms of his injuries. when they get to the residence where these individuals live-- and this is where they're talking about a controlled detonation-- they find explosives, they find evidence of the smokeless powder we talked about, in this case a synthetic type smokeless powder but they also find a number of pipe bombs, capped at both ends

with fuses so it further underscores something we've been talking about through the day which is this was not their final act, apparently, the attack on the boston marathon or if it was they were certainly prepared with enough explosives and different kinds of bombs to go ahead and do other things. we just don't know what that might have been >> this is breaking news, this new information. we have built one more bomb the kind of bomb they used on monday at the boston marathon. i threw it at police last night but it didn't explode with intensity and then you also said that they had -- this is new, that they had built pipe bombs they were sealed with pipe caps and had fuses in them.

what were they up to? >> that's the big question. you won't find out from tamerlan because he's dead. part of getting dzhokhar, we don't know what they're going to find on computers, hard drives, thumb drives, e-mails. there may be all the clues they need but getting dzhokhar alive is going to be fairly important if they can because they'll want to know two important things. what was to be next, if anything and who, if anyone, were you going to do it with or for? >> pelley: well, this new information, john, that you've turned up the tells us a lot about w we've been seeing at this home where the brothers were from. the bomb squad, the explosive ordnance disposal unit, the warning from the state police that the city should not be alarmed if it hears another explosion because that would be the police purposefully

detonating the explosives they found in the house. this is a live picture of that street, of that neighborhood and apparently the house was a bomb-making knacktory from the information that you've received john. they were busy making a lot of explosives and making explosives out of this smokeless powder that you described. >> that's right. it's a low order explosive but in the right container it can be very, very effective. it's also ease siff to get without creating a lot of attention. when you look at the options these guys are old school when it comes to the bomb making business. the pressure cooker bomb is a tried and true element that is trained in online forums for terrorists in al qaeda camps in afghanistan but we've seen it with many other groups, including domestic groups, that you can go and buyed without arousing suspicion.

the fuses with those are the simplest kind of detonation system that you can think of and it was -- it's going to be very interesting when he threw this device at police what it was that set it off. it doesn't seem like the kind of thing where you have time to light a fuse and toss it. it would be very hard to do a remote control detonation. is but that must have been-- however he arranged it-- some incredible scene like war in the streets. >> pelley: it sounded like a war in the videotape that we had. so many people asked me why a pressure cooker. these are six qaurt pressure cookers, the kind that you find in kitchens all across america. you can get them at wal-mart or any place else. what's so special about that? >> a couple of things. number one, frankly, if you go into home depot and say "i want ten metal pipes and 20 end caps for each side" somebody's going

to think you might be making a pipe bomb-- or ten of them. but if you go to a kitchen appliance store and you want to buy a pressure cooker or two pressure cookers somebody might think you like to heat rice or you work in a restaurant. it's not going to arouse suspicion. as for its quality as a container, it's airtight, most of them have a hole in the top where you can run wires down and seal that with a nut or glue so you can maintain the airtight thing and have your initiator inside. it's not a difficult device to make and the structure of the pressure cooker lends itself to you can have your explosion inside until it can't contain the explosive energy anymore and it itself becomes shrapnel as well as whatever you add to it in terms of nails, nuts and bolts on the inside or outside. i was deliberately not too specific about it because we're not giving out bomb making lessons on television because

this is a device that we've seen all over the world, instructions are readily available and places that are far too public. >> and this thing was packed as we know now from what was taken out of the victims' bodies. this was packed with mails and ball bearings and that sort of thing designed to maim and kill as many people as possible. >> that's right. and it was placed in a crowd at a very public event. it was -- it is the most deliberate anti-personnel device that you can construct in a public place like that. >> pelley: as the day wears on, we are running into more and more people who knew these men. we have heard from one of their uncles. we have heard from one of their aunts. dzhokhar tsarnaev, the 19-year-old who is currently hiding out from the dragnet in boston, was a student at the university of massachusetts dartmouth campus and a short

time ago we were able to get an interview with another student there who knew him. here's a piece of that. >> i was an engineering major last year, freshman year and dzhokhar was actually my partner in engineering. we worked on a couple circuit boards together making lights work and he was a very nice kid. i got along with them very well. said high to him everyday. wasn't very outgoing, very quiet. didn't expect anything like this from him but it's very scary that he lived in pine dale just a hundred couple feet from us and it's awful. >> pelley: certainly somebody flying under the radar. somebody who people did not expect rand surprised to hear. no one's more surprised to hear than the members of his extended family. it wasn't long ago that we heard from one of his aunts.

>> ask for evidence yourself. ask fo evidence whole world now. ask for evidence we're requesting, we're demanding evidence. is f that is you, you take the plane because if you did it, you did it for some purpose. explain it, take the responsibility. what else can i say? >> pelley: and a little bit earlier this morning we heard from one of his uncles. a reporter asked the uncle what he would say to dzhokhar if he could speak to him now. >> reporter: what would you say to dzhokhar right now? >> i'd say dzhokhar, if you're alive, turn yourself in, dzhokhar. and ask for forgiveness from the victims, from the injured and from those who left ask for forgiveness from these people. we're not requiring forgiveness in this family.

he put a shame on this family. he put a shame on the entire chechen ethnicity. because everyone now names -- they play with word chechen so they put that shame on the entire ethnicity. that's what i would say. turn yourself in and whatever -- put yourself on the discretion of those who are here. that's what i would say. >> pelley: in the event he doesn't turn himself in, a "wanted" poster has been put together by the authorities. this has just been delivered to us these are the pictures we've become familiar with of dzhokhar tsarnaev, 19 years old. the subject of a dragnet in the city of boston. according to the authorities, he is the last remaining suspect in the boston marathon bombings, his brother tamerlan was killed in a fire fight with police in

the wee hours of the morning. a fire fight that dzhokhar apparently managed to escape. anthony mason has been digging into the history of these two men and, anthony, you have more information for us? >> yes, scott. we've turned up some photographs of tamerlan tsarnaev from some boxing training photographs. you're looking at them here. they originally appeared in a photo essay for boston university magazine. i'm not sure why they were there because he didn't go to boston university but this is a photo essay that shows him training for boxing. what's interesting about it is there were a number of captions attached to it, both in the magazine and the photographer's web site in which tamerlan says "i don't have a single american friend. i don't understand them." he hoped to be selected for the u.s. olympic team, he says, in this essay. that he'd rather compete for the u.s. than for russia where, of course, he lived for a time. he says also in this photo essay that he doesn't drink or smoke anymore. he says "god said no alcohol,

i'm a muslim, there are no values anymore. " and he worries people can't control themselves anymore. there are also a couple photographs of him boxing with the woman in this who is identified as his girlfriend. he says that she is half portuguese,f italian and converted to his islam. now we do know he recently married someone and has a child but we can't be certain the woman in these photographs is, in fact, his wife. he was taking a break from bunker hill community college in boston, said he wanted to be an engineer, took the semester off to compete in boxing. as we mentioned, the other significant details with his brother dzhokhar is that he was spotted yesterday on the campus of the university of massachusetts at dartmouth in his dorm room around lunchtime and then was later seen driving away a short time after that. >> pelley: it was the younger brother who was seen at the university of massachusetts dartmouth. we're told the swat team has arrived on the campus.

that the campus has been evacuated. the school has been we don't have any reason to believe that he is there today but that is what the -- an assumption that the police are trying to clear at this point and the pictures of the boxer that we saw are pictures of the elder brother who is now dead in that fire fight. john miller, you just told me something fascinating. chilling, really, about the bomb that was thrown at the police officers last night during this fire fight in boston. >> so during the fire fight tamerlan throws this package with this device in it which we were told was another pressure cooker bomb, same one used at the race. but the top of it flew off which basically newters its effectiveness as a pressure cooker and the explosives went off inside and instead of fraging into a million pieces the lid went this way, the pressure cooker went that way and ended up flying like a

missile embedded in the side of a police car. >> pelley: the police officers are incredibly lucky. they were essentially facing the exact same device that killed three people and wounded 170 at the boston marathon. >> and if the scenario i've been given is accurate and the top had stayed on and it had remained airtight, what you have there was an individual who was charging at the police through this device out with the intent of killing himself and all of the officers there. they're very lucky this that didn't go as planned if, in fact, that is what the intent was. >> i want to remind you that the reason we're on the air right now is that we are waiting for two events in this rapidly unfolding story. they are the boston police are planning a controlled detonation of additional explosive material at the home of the two boston marathon bombing suspects. this is an aerial that you're

watching now of the street. they have been thinking long and hard about how they want to destroy the explosive material that has apparently been found the house. state police warned the city of boston several hours agothat they should not be alarmedf they hear another explosion because that would be the police using their own explosives to detonate the explosives they found in the house because in the opinion of the bomb squad at that point in time that was the safest way to do that. the other reason that we're on the air is that press briefings have been forecast by the officials in boston but, of course, because they have so much that they are doing they have missed the deadlines on these press briefings so we're staying on the air to get that information to you as soon as the officials there in boston

find it convenient. to catch you up on what has been happening today. boston police, federal agents are involved in a dragnet in the city of boston unlike anything that we have seen in recent times. they are hunting for this man. 19-year-old dzhokhar tsarnaev who is on the run believed to be the last remaining suspect in the boston marathon bombing. there was a ferocious fire fight in boston last night, we have videotape and we're going to listen into this. this was the fight between, according to authorities, these men and the police in the wee hours of the morning. (gunshots and explosions) >> pelley: there's explosions and guire going on down the

street. >> that was the gun battle that killed one of the two brothers, 26-year-old tamerlan tsarnaev and it was after that gun battle that the younger brother, the 19-year-old, apparently got away. he drove away in the car they that they had, a car that they had hijacked from someone and drove it several blocks away, bailed out of the car ans been the target of an intense manhunt that has locked down the entire city of boston all day long. john miller was reporting from his sources earlier that ar bomb

very similar in design to the type that was used on monday at the boston marathon was thrown at the police officers in that fire fight. it detonated but it did not detonate with the same force because of a malfunction in the design and as a result if any police officers were injured by it we haven't heard about it but apparently these men have built a number of bombs. john miller reported to us that pipe bombs, another type of bomb coveha ad and so it is not at all clear w these brothers had in mind but they had in mind needing other explosive devices. perhaps there were other targets that they had in mind but they have used some of these explosives in that running gun battle with police overnight and now the 19-year-old is missing.

the police about three hours ago now said that they had searched 70% of the 20-block area that they had cordoned off. one has to imagine that in the last three hours they have gotten pretty much through that search. we have not heard anything more about an arrest. as a precaution, all mass transit has been shut down in boston. as a precaution the amtrak passenger service from boston to new york has been shut down. trains on that line earlier this morning were stopped on the tracks by police and searched car by car against the chance that the young man had slipped the police cordon and was headed out of t city. but nothing was found in any of those searches and the whereabouts of dzhokhar tsarnaev are a complete mystery at this point in time. we received a picture from the white house a little while ago. the president was being briefed

by the f.b.i. director. his counterterrorism advisor, lisa monaco, the attorney general eric holder you see there as well and then the vice president on the right-hand side of the frame. as we lood at this picture i'd like to bring our chief washington correspondent and anchor of "face the nation" bob schieffer into this conversation again. bob, this raises all kinds of troubling questions for the president and for the national security team. we just don't know what motivated these young men. that part of russia has been in open rebellion against moscow if many years. >> schieffer: that's right, scott, and one thing we have to keep in mind, these lines that are drawn around this province of chechnya